A low-temperature solder raw material premixing and homogenizing device

Abstract

The utility model discloses a low temperature solder raw material premixing homogenizing device relates to low temperature solder raw material mixing technical field, including base, the base is fixedly installed with mixing jar and a plurality of weighing platform, a plurality of weighing platform is along the mixing jar circumference array distribution, and each weighing platform is fixedly installed with feeding mechanism, the inside of mixing jar is provided with grinding assembly and mixing subassembly from top to bottom in proper order, be provided with drive assembly between grinding assembly and mixing subassembly, drive assembly includes equipment box, equipment box fixed connection is in mixing jar and penetrates mixing jar. The utility model has replaced traditional manual weighing, and the feeding link has been replaced, makes multiple components parallel feeding, has reduced batch interval time, and the feeding cycle has been shortened, and the efficiency has been promoted, and after the raw material grinding, stirs, makes the mixing of multiple component raw materials even, avoids the performance fluctuation caused by the uneven particle when subsequent forming processing.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature solder raw material mixing technology, and in particular to a low-temperature solder raw material premixing and homogenizing device. Background Technology

[0002] Low-temperature solder raw materials are the core of achieving "low-temperature soldering." These materials use low-melting-point metal alloys as a base, combined with flux, and achieve the core characteristics of "low melting point, high reliability, and environmental friendliness" through compositional control. Their classification focuses on compositional systems and environmental attributes, and their applications cover precision manufacturing fields such as electronics, new energy, and medical fields. They are key materials for achieving the welding of heat-sensitive components and dissimilar materials. In the future, with the increasing demand for lead-free and low-temperature solders, Sn-Bi and Sn-In solders will become the mainstream development direction.

[0003] Low-temperature solder raw material premixing is a key pretreatment device in the low-temperature solder production process. Its core function is to uniformly mix various solid raw materials in precise proportions, such as metal powders, alloy particles, and fluxes, to provide stable and uniformly dispersed raw materials for subsequent melting and forming processes. In existing technologies, raw material mixing largely relies on manual weighing and feeding. Manual operation requires weighing and feeding batch by batch, resulting in a high proportion of auxiliary time and low efficiency, making it difficult to meet the needs of continuous production. Metal powders and fluxes are prone to stratification, and coarse-particle raw materials can easily lead to fluctuations in the performance of the subsequently formed solder. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a low-temperature solder raw material premixing and homogenizing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A low-temperature solder raw material premixing and homogenizing device includes a base, on which a mixing tank and several weighing platforms are fixedly installed. The weighing platforms are arranged in a circumferential array along the mixing tank, and each weighing platform is fixedly installed with a feeding mechanism. The device is characterized in that: a grinding component and a mixing component are arranged sequentially from top to bottom inside the mixing tank, and a driving component is arranged between the grinding component and the mixing component. The driving component includes a device box, which is fixedly connected to and passes through the mixing tank. A controller is fixedly installed on the front side of the device box, and a drive motor is fixedly installed on the rear side of the device box. A transmission unit is arranged inside the device box, and the drive motor drives the grinding component and the mixing component to operate through the transmission unit.

[0007] Furthermore, the feeding mechanism includes a bracket fixedly mounted on the weighing platform, on which a feeding pipe and a hopper are fixedly installed. A discharge pipe is installed above the outer wall of the hopper. A feeding motor is fixedly mounted at the top of the hopper. A long shaft extending into the feeding pipe is fixedly connected to the output shaft of the feeding motor. An auger for conveying materials is fixedly connected to the outer wall of the long shaft.

[0008] Furthermore, the end of the discharge pipe away from the feed pipe is inserted into the mixing tank but does not contact the mixing tank, and a cloth bag is fixedly connected to the end of the discharge pipe located inside the mixing tank.

[0009] Furthermore, the transmission unit includes a horizontal shaft rotatably disposed inside the equipment box, one end of which is connected to the output end of the drive motor. The top and bottom of the equipment box are respectively rotatably connected to a grinding shaft and a stirring shaft via bearings. A main gear is fixedly sleeved on the horizontal shaft. An upper gear that meshes with the main gear is fixedly sleeved at the bottom end of the grinding shaft. A lower gear that meshes with the main gear is fixedly sleeved at the top end of the stirring shaft.

[0010] Furthermore, the grinding assembly includes an upper grinding disc fixedly connected inside the mixing tank, a grinding inlet is provided in the middle of the upper grinding disc, and a lower grinding disc is fixedly connected to the top of the grinding shaft. The lower grinding disc is located at the bottom of the upper grinding disc and there is a gap between the two.

[0011] Furthermore, the mixing assembly includes a connecting frame fixedly connected to the bottom end of the stirring shaft, with a spiral blade fixedly connected to the outer side of the connecting frame and contacting the inner wall of the mixing tank, and a stirring blade fixedly connected to the inner side of the connecting frame.

[0012] Furthermore, the top of the device box has a triangular structure, and the top of the upper grinding disc is inverted conical.

[0013] Furthermore, the controller is electrically connected to the weighing platform, the drive motor, and the feeding motor via wires.

[0014] All electronic components and mechanical structures involved in this application must conform to the operating environment.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this application, each weighing platform independently carries a hopper containing one component of raw materials. The weighing platform monitors the weight of the raw materials in the hopper in real time and feeds it back to the controller. The controller controls the start and stop of the feeding motor according to the preset formula ratio. The feeding motor drives the long shaft and auger to rotate. The auger spirals along the inner wall of the feeding pipe, steadily pushing the raw materials from the hopper to the discharge pipe. When the weighing platform detects that the amount of raw materials in the hopper has decreased to the set value, it controls the feeding motor to stop, completing the quantitative feeding of a single component. This replaces the traditional manual weighing and feeding process and allows multiple components to be fed in parallel, significantly reducing the batch interval time, shortening the feeding cycle, and improving efficiency compared to manual operation.

[0017] 2. In this application, the drive motor simultaneously meshes the upper gear of the grinding shaft and the lower gear of the stirring shaft through the main gear on the horizontal shaft, realizing the synchronous drive of the grinding component and the mixing component, thus reducing energy consumption; the lower grinding disc rotates with the grinding shaft and cooperates with the upper grinding disc to grind the raw materials, significantly enhancing the interfacial bonding force between the raw material particles, and providing a guarantee for the strength of the green body after subsequent pressing and molding; the connecting frame at the bottom of the stirring shaft integrates the spiral blade and the stirring blade, so that the multi-component raw materials are mixed evenly, avoiding performance fluctuations caused by uneven particle size during subsequent molding and processing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the feeding mechanism of this utility model;

[0020] Figure 3 This is a partial cross-sectional view of the feeding mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the mixing tank structure of this utility model;

[0022] Figure 5 This is a partial cross-sectional view of the mixing tank of this utility model;

[0023] Figure 6 This is a schematic diagram of a partial component structure inside the mixing tank of this utility model;

[0024] Figure 7 For the present utility model Figure 6 Enlarged structural diagram at point A in the middle.

[0025] Legend: 100, Base; 200, Mixing tank; 300, Weighing platform; 400, Feeding mechanism; 401, Support; 402, Feeding pipe; 403, Hopper; 404, Discharge pipe; 405, Feeding motor; 406, Long shaft; 407, Screwdriver; 408, Filter bag; 500, Grinding assembly; 501, Upper grinding disc; 502, Grinding inlet; 503, Lower grinding disc; 600, Mixing assembly; 601, Connecting frame; 602, Spiral blade; 603, Stirring blade; 700, Drive assembly; 701, Equipment box; 702, Drive motor; 703, Horizontal shaft; 704, Grinding shaft; 705, Stirring shaft; 706, Main gear; 707, Upper gear; 708, Lower gear; 800, Controller. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0028] like Figure 1-7 As shown, this utility model provides a low-temperature solder raw material premixing and homogenizing device, including a base 100, a mixing tank 200 and several weighing platforms 300 fixedly installed on the base 100. The several weighing platforms 300 are arranged in a circumferential array along the mixing tank 200, and a feeding mechanism 400 is fixedly installed on each weighing platform 300. The device is characterized in that: a grinding component 500 and a mixing component 600 are arranged sequentially from top to bottom inside the mixing tank 200. A driving component 700 is arranged between the grinding component 500 and the mixing component 600. The driving component 700 includes a device box 701, which is fixedly connected to and passes through the mixing tank 200. A controller 800 is fixedly installed on the front side of the device box 701, and a drive motor 702 is fixedly installed on the rear side of the device box 701. A transmission unit is arranged inside the device box 701, and the drive motor 702 drives the grinding component 500 and the mixing component 600 to run through the transmission unit.

[0029] In this embodiment, the feeding mechanism 400 includes a bracket 401 fixedly mounted on the weighing platform 300. A feeding pipe 402 and a hopper 403 that are interconnected are fixedly mounted on the bracket 401. A discharge pipe 404 is connected to the upper part of the outer wall of the hopper 403. A feeding motor 405 is fixedly mounted on the top of the hopper 403. A long shaft 406 extending into the feeding pipe 402 is fixedly connected to the output shaft of the feeding motor 405. An auger 407 for conveying materials is fixedly connected to the outer wall of the long shaft 406.

[0030] Specifically, the output shaft of the feeding motor 405 drives the long shaft 406 to rotate, and the auger 407 spirals along the inner wall of the feeding pipe 402 to push the raw material from the hopper 403 to the discharge pipe 404, and finally into the mixing tank 200. The weighing platform 300 monitors the weight of the raw material in the hopper 403 in real time, and adjusts the start and stop of the feeding motor 405 through the controller 800 to achieve quantitative feeding, ensuring that the multi-component solder raw materials are added in the preset ratio, and ensuring the quality of the mixing and homogenization.

[0031] In this embodiment, the end of the discharge pipe 404 away from the feed pipe 402 is inserted into the mixing tank 200 but does not contact the mixing tank 200. The end of the discharge pipe 404 located inside the mixing tank 200 is fixedly connected to a cloth bag 408.

[0032] Specifically, after the raw material is conveyed to the discharge pipe 404 by the auger 407, it is buffered by the cloth bag 408 and falls into the mixing tank 200 to avoid dust generation from the powdered solder raw material. At the same time, the discharge pipe 404 does not contact the inner wall of the mixing tank 200 to avoid affecting the weighing.

[0033] In this embodiment, the transmission unit includes a horizontal shaft 703 rotatably disposed inside the equipment box 701. One end of the horizontal shaft 703 is connected to the output end of the drive motor 702. The top and bottom of the equipment box 701 are respectively rotatably connected to a grinding shaft 704 and a stirring shaft 705 via bearings. A main gear 706 is fixedly sleeved on the horizontal shaft 703. An upper gear 707 that meshes with the main gear 706 is fixedly sleeved at the bottom end of the grinding shaft 704. A lower gear 708 that meshes with the main gear 706 is fixedly sleeved at the top end of the stirring shaft 705.

[0034] Specifically, the drive motor 702 drives the horizontal shaft 703 to rotate. The main gear 706 on the horizontal shaft 703 simultaneously meshes with the upper gear 707 and the lower gear 708, synchronously driving the grinding shaft 704 and the stirring shaft 705 through gear transmission. A single drive motor 702 simultaneously drives the grinding and mixing mechanisms, simplifying the equipment structure and reducing energy consumption. It should be noted that the gears selected here are suitable for actual use, and gear wear is a normal phenomenon that can be resolved by replacement. The equipment box 701 is a sealed cavity, and rotation is achieved through sealed bearings, which are used for dust prevention and lubrication during actual use.

[0035] In this embodiment, the grinding assembly 500 includes an upper grinding disc 501 fixedly connected to the mixing tank 200. A grinding inlet 502 is provided in the middle of the upper grinding disc 501. A lower grinding disc 503 is fixedly connected to the top of the grinding shaft 704. The lower grinding disc 503 is located at the bottom of the upper grinding disc 501 and there is a gap between the two.

[0036] Specifically, the raw material enters between the upper grinding disc 501 and the lower grinding disc 503 through the grinding inlet 502. When the grinding shaft 704 drives the lower grinding disc 503 to rotate, it forms a shearing and squeezing action with the upper grinding disc 501, grinding the blocky or coarse-particle raw material into fine powder. This allows for more thorough contact between the molecules of each component during subsequent mixing, improving the uniformity of the solder composition. It should be noted that the working surfaces of the upper grinding disc 501 and the lower grinding disc 503 opposite each other are provided with a combination of radial grooves and annular raised ridges. The lower grinding disc 503 mates with the upper grinding disc 501, and its upper surface is provided with a combination of spiral grooves and toothed bosses. This mating method is clearly recorded in the "Grinding Equipment Design" chapter of the "Mechanical Design Handbook (Sixth Edition)" and the industry standard JB / T 10809-2007 "Technical Conditions for Double-Disc Grinding Machines". These are common configurations of double-disc grinding equipment in the prior art, and have been disclosed in many patent documents and industry technical materials. They are mature technical solutions known to those skilled in the art.

[0037] In this embodiment, the mixing component 600 includes a connecting frame 601 fixedly connected to the bottom end of the stirring shaft 705. A spiral blade 602 that contacts the inner wall of the mixing tank 200 is fixedly connected to the outer side of the connecting frame 601, and a stirring blade 603 is fixedly connected to the inner side of the connecting frame 601.

[0038] Specifically, when the stirring shaft 705 rotates, the spiral blades 602 scrape off the residual raw materials on the tank wall, and the stirring blades 603 stir inside the tank, promoting the mixing of materials and rapidly homogenizing the ground fine powder raw materials.

[0039] In this embodiment, the top of the device box 701 is a triangular structure, and the top of the upper grinding disc 501 is an inverted cone shape.

[0040] Specifically, the top of the equipment box 701 has a triangular structure to avoid the accumulation of raw material powder, and the top of the upper grinding disc 501 is inverted conical. Gravity can be used to make the raw material falling from the top of the mixing tank 200 automatically flow towards the center along the conical surface and finally converge at the grinding inlet 502.

[0041] In this embodiment, the controller 800 is electrically connected to the weighing platform 300, the drive motor 702 and the feeding motor 405 via wires.

[0042] Specifically, the weighing platform 300 provides feedback on the raw material weight signal, and the controller 800 starts and stops the feeding motor 405 according to the preset formula instructions. Simultaneously, it adjusts the drive motor 702 to control grinding and mixing. The controller 800 supports digital setting of parameters such as grinding speed, mixing time, and raw material ratio, and can store production data for easy quality traceability and process optimization. It is important to note that the hardware type, electrical topology of the connection circuit, and logic strategy of the control scheme of the controller 800 are all mature and widely used existing technologies in the field of industrial automation. These technologies have been disclosed in automated equipment in food processing, chemical mixing, and material preparation. Their functional implementation, circuit design, and control logic are all conventional technical means that can be implemented by those skilled in the art without creative effort.

[0043] All electronic components and mechanical structures involved in this application must conform to the operating environment.

[0044] How to use and how to work this device:

[0045] First, solder materials or fluxes of different components are placed into hoppers 403 on each weighing platform 300. The weighing platform 300 monitors the weight of the materials in the hoppers 403 in real time and feeds it back to the controller 800. The controller 800 controls the feeding motor 405 to start according to the preset formula ratio. The feeding motor 405 drives the long shaft 406 to rotate the auger 407. The auger 407 spirals along the inner wall of the feeding pipe 402, pushing the materials from the hoppers 403 to the discharge pipe 404, and finally into the mixing tank 200. When the weighing platform 300 detects that the weight of the materials in the hoppers 403 has decreased by a set value, the controller 800 controls the feeding motor 405 to stop, completing the quantitative feeding without the need for manual weighing and feeding, thus improving production efficiency.

[0046] While feeding materials, the drive motor 702 drives the horizontal shaft 703 to rotate. The main gear 706 on the horizontal shaft 703 simultaneously meshes with the upper gear 707 and the lower gear 708, driving the grinding shaft 704 and the stirring shaft 705 to rotate through gear transmission. A single drive motor 702 simultaneously drives the grinding and mixing mechanisms, simplifying the equipment structure and reducing energy consumption.

[0047] The raw material is guided by the inverted conical top of the upper grinding disc 501 and automatically converges to the grinding inlet 502. It enters between the upper grinding disc 501 and the lower grinding disc 503. When the grinding shaft 704 rotates, it can drive the lower grinding disc 503 to rotate, forming a shearing and squeezing action with the upper grinding disc 501, grinding the blocky or coarse-particle raw material into fine powder. After grinding, the particle size of the raw material is reduced and the specific surface area is increased, so that the molecular contact between the components is more sufficient during subsequent mixing, and the homogeneity can be improved.

[0048] The ground raw material falls into the mixing tank 200. When the stirring shaft 705 rotates, the spiral blade 602 scrapes off the raw material remaining on the inner wall of the mixing tank 200, and the stirring blade 603 stirs in the tank to make the solder material mixed evenly, so as to avoid performance fluctuations caused by uneven particles during subsequent molding and processing.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A low-temperature solder raw material premixing and homogenizing device, comprising a base (100), on which a mixing tank (200) and a plurality of weighing platforms (300) are fixedly mounted, the plurality of weighing platforms (300) being arranged in a circumferential array along the mixing tank (200), and each of the weighing platforms (300) being fixedly mounted with a feeding mechanism (400), characterized in that: Inside the mixing tank (200), a grinding assembly (500) and a mixing assembly (600) are arranged sequentially from top to bottom. A drive assembly (700) is arranged between the grinding assembly (500) and the mixing assembly (600). The drive assembly (700) includes a device box (701), which is fixedly connected to and passes through the mixing tank (200). A controller (800) is fixedly installed on the front side of the device box (701), and a drive motor (702) is fixedly installed on the rear side of the device box (701). A transmission unit is provided inside the device box (701), and the drive motor (702) drives the grinding assembly (500) and the mixing assembly (600) to run through the transmission unit.

2. The low-temperature solder raw material premixing and homogenizing device according to claim 1, characterized in that: The feeding mechanism (400) includes a bracket (401) fixedly mounted on a weighing platform (300). A feeding pipe (402) and a hopper (403) connected to each other are fixedly mounted on the bracket (401). A discharge pipe (404) is connected to the upper part of the outer wall of the hopper (403). A feeding motor (405) is fixedly mounted on the top of the hopper (403). A long shaft (406) extending into the feeding pipe (402) is fixedly connected to the output shaft of the feeding motor (405). An auger (407) for conveying materials is fixedly connected to the outer wall of the long shaft (406).

3. The low-temperature solder raw material premixing and homogenizing device according to claim 2, characterized in that: The end of the discharge pipe (404) away from the feed pipe (402) is inserted into the mixing tank (200) and does not contact the mixing tank (200). The end of the discharge pipe (404) located inside the mixing tank (200) is fixedly connected to a cloth bag (408).

4. The low-temperature solder raw material premixing and homogenizing device according to claim 1, characterized in that: The transmission unit includes a horizontal shaft (703) rotatably disposed inside the equipment box (701). One end of the horizontal shaft (703) is connected to the output end of the drive motor (702). The top and bottom of the equipment box (701) are respectively rotatably connected by bearings to a grinding shaft (704) and a stirring shaft (705). A main gear (706) is fixedly sleeved on the horizontal shaft (703). An upper gear (707) meshing with the main gear (706) is fixedly sleeved at the bottom end of the grinding shaft (704). A lower gear (708) meshing with the main gear (706) is fixedly sleeved at the top end of the stirring shaft (705).

5. The low-temperature solder raw material premixing and homogenizing device according to claim 4, characterized in that: The grinding assembly (500) includes an upper grinding disc (501) fixedly connected inside the mixing tank (200), a grinding inlet (502) is provided in the middle of the upper grinding disc (501), and a lower grinding disc (503) is fixedly connected to the top of the grinding shaft (704). The lower grinding disc (503) is located at the bottom of the upper grinding disc (501) and there is a gap between the two.

6. The low-temperature solder raw material premixing and homogenizing device according to claim 4, characterized in that: The mixing assembly (600) includes a connecting frame (601) fixedly connected to the bottom end of the stirring shaft (705), a spiral blade (602) that contacts the inner wall of the mixing tank (200) is fixedly connected to the outside of the connecting frame (601), and a stirring blade (603) is fixedly connected to the inside of the connecting frame (601).

7. The low-temperature solder raw material premixing and homogenizing device according to claim 5, characterized in that: The top of the device box (701) has a triangular structure, and the top of the upper grinding disc (501) is an inverted cone shape.

8. The low-temperature solder raw material premixing and homogenizing device according to claim 2, characterized in that: The controller (800) is electrically connected to the weighing platform (300), the drive motor (702) and the feeding motor (405) via wires.

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